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Pamelina
Taxonomy
Pamelina was named by Evans (2009). Its type is Pamelina polonica. It was considered monophyletic by Evans (2009).
It was assigned to Kuehneosauridae by Evans (2009).
It was assigned to Kuehneosauridae by Evans (2009).
Species
P. polonica (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2009 | Pamelina Evans |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. E. Evans 2009 | Small diapsid reptile resembling Late Triassic kuehneosaurids in having confluent nares framed by specialised premaxillae with posterolateral but not dorsomedial processes; maxilla almost excluded from the narial margin by the posterolateral process of the premaxilla; prefrontal with only a narrow contribution to the preorbital skull wall; loss of the parietal foramen; anterolateral flange on the parietal meeting postorbital to exclude the postfrontal from the margins of the upper temporal fenestra; specialised slender squamosal with a strong posterodorsal process but no anteroventral ramus; no supratemporal bone; mediolaterally compressed amphiplatyan vertebral centra with short slender transverse processes throughout the column; dichocephalous ribs on cervical vertebrae, slender holocephalous ribs on dorsal vertebrae; very lightly built skeleton, bones with internal cavities. Pamelina differs from Kuehneosaurus, Kuehneosuchus, and Icarosaurus in lacking teeth on the parasphenoid, and in having more gracile ribs and vertebrae, with short narrow circular transverse processes (unlike the extended processes of Late Triassic taxa) and only limited buttressing on the vertebral body (as against strong buttressing, especially in Kuehneosaurus). Pamelina also differs from the British kuehneosaurs in lacking three−headed ribs on anterior vertebrae (the condition in Icarosaurus is less certain, Colbert 1970, p. 107). Pamelina differs from all other known Permian andMesozoic diapsids in the combination of confluent nares with a reduced squamosal, an incomplete lower temporal arcade, an expanded quadrate, and laterally compressed amphiplatyan vertebrae with long slender transverse processes and extended ribs. The skull of the Triassic Mecistotrachelos (Fraser 2007) is poorly known, but the postcranial skeleton of Pamelina differs in having relatively short cervical vertebrae. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||